<?php

/**
 * Simple filter to handle greater than/less than filters
 */
class views_handler_filter_numeric extends views_handler_filter {

    var $no_single = TRUE;

    function option_definition() {
        $options = parent::option_definition();

        $options['value'] = array(
            'contains' => array(
                'min' => array('default' => ''),
                'max' => array('default' => ''),
                'value' => array('default' => ''),
            ),
        );

        return $options;
    }

    function operators() {
        $operators = array(
            '<' => array(
                'title' => t('Is less than'),
                'method' => 'op_simple',
                'short' => t('<'),
                'values' => 1,
            ),
            '<=' => array(
                'title' => t('Is less than or equal to'),
                'method' => 'op_simple',
                'short' => t('<='),
                'values' => 1,
            ),
            '=' => array(
                'title' => t('Is equal to'),
                'method' => 'op_simple',
                'short' => t('='),
                'values' => 1,
            ),
            '!=' => array(
                'title' => t('Is not equal to'),
                'method' => 'op_simple',
                'short' => t('!='),
                'values' => 1,
            ),
            '>=' => array(
                'title' => t('Is greater than or equal to'),
                'method' => 'op_simple',
                'short' => t('>='),
                'values' => 1,
            ),
            '>' => array(
                'title' => t('Is greater than'),
                'method' => 'op_simple',
                'short' => t('>'),
                'values' => 1,
            ),
            'between' => array(
                'title' => t('Is between'),
                'method' => 'op_between',
                'short' => t('between'),
                'values' => 2,
            ),
            'not between' => array(
                'title' => t('Is not between'),
                'method' => 'op_between',
                'short' => t('not between'),
                'values' => 2,
            ),
        );

        // if the definition allows for the empty operator, add it.
        if (!empty($this->definition['allow empty'])) {
            $operators += array(
                'empty' => array(
                    'title' => t('Is empty (NULL)'),
                    'method' => 'op_empty',
                    'short' => t('empty'),
                    'values' => 0,
                ),
                'not empty' => array(
                    'title' => t('Is not empty (NOT NULL)'),
                    'method' => 'op_empty',
                    'short' => t('not empty'),
                    'values' => 0,
                ),
            );
        }

        return $operators;
    }

    /**
     * Provide a list of all the numeric operators
     */
    function operator_options($which = 'title') {
        $options = array();
        foreach ($this->operators() as $id => $info) {
            $options[$id] = $info[$which];
        }

        return $options;
    }

    function operator_values($values = 1) {
        $options = array();
        foreach ($this->operators() as $id => $info) {
            if ($info['values'] == $values) {
                $options[] = $id;
            }
        }

        return $options;
    }

    /**
     * Provide a simple textfield for equality
     */
    function value_form(&$form, &$form_state) {
        $form['value']['#tree'] = TRUE;

        // We have to make some choices when creating this as an exposed
        // filter form. For example, if the operator is locked and thus
        // not rendered, we can't render dependencies; instead we only
        // render the form items we need.
        $which = 'all';
        if (!empty($form['operator'])) {
            $source = ($form['operator']['#type'] == 'radios') ? 'radio:options[operator]' : 'edit-options-operator';
        }

        if (!empty($form_state['exposed'])) {
            $identifier = $this->options['expose']['identifier'];

            if (empty($this->options['expose']['use_operator']) || empty($this->options['expose']['operator'])) {
                // exposed and locked.
                $which = in_array($this->operator, $this->operator_values(2)) ? 'minmax' : 'value';
            } else {
                $source = 'edit-' . form_clean_id($this->options['expose']['operator']);
            }
        }

        if ($which == 'all') {
            $form['value']['value'] = array(
                '#type' => 'textfield',
                '#title' => empty($form_state['exposed']) ? t('Value') : '',
                '#size' => 30,
                '#default_value' => $this->value['value'],
                '#process' => array('views_process_dependency'),
                '#dependency' => array($source => $this->operator_values(1)),
            );
            if (!empty($form_state['exposed']) && !isset($form_state['input'][$identifier]['value'])) {
                $form_state['input'][$identifier]['value'] = $this->value['value'];
            }
        } else if ($which == 'value') {
            // When exposed we drop the value-value and just do value if
            // the operator is locked.
            $form['value'] = array(
                '#type' => 'textfield',
                '#title' => empty($form_state['exposed']) ? t('Value') : '',
                '#size' => 30,
                '#default_value' => $this->value['value'],
            );
            if (!empty($form_state['exposed']) && !isset($form_state['input'][$identifier])) {
                $form_state['input'][$identifier] = $this->value['value'];
            }
        }

        if ($which == 'all' || $which == 'minmax') {
            $form['value']['min'] = array(
                '#type' => 'textfield',
                '#title' => empty($form_state['exposed']) ? t('Min') : '',
                '#size' => 30,
                '#default_value' => $this->value['min'],
            );
            $form['value']['max'] = array(
                '#type' => 'textfield',
                '#title' => empty($form_state['exposed']) ? t('And max') : t('And'),
                '#size' => 30,
                '#default_value' => $this->value['max'],
            );
            if ($which == 'all') {
                $dependency = array(
                    '#process' => array('views_process_dependency'),
                    '#dependency' => array($source => $this->operator_values(2)),
                );
                $form['value']['min'] += $dependency;
                $form['value']['max'] += $dependency;
            }
            if (!empty($form_state['exposed']) && !isset($form_state['input'][$identifier]['min'])) {
                $form_state['input'][$identifier]['min'] = $this->value['min'];
            }
            if (!empty($form_state['exposed']) && !isset($form_state['input'][$identifier]['max'])) {
                $form_state['input'][$identifier]['max'] = $this->value['max'];
            }

            if (!isset($form['value'])) {
                // Ensure there is something in the 'value'.
                $form['value'] = array(
                    '#type' => 'value',
                    '#value' => NULL
                );
            }
        }
    }

    function query() {
        $this->ensure_my_table();
        $field = "$this->table_alias.$this->real_field";

        $info = $this->operators();
        if (!empty($info[$this->operator]['method'])) {
            $this->{$info[$this->operator]['method']}($field);
        }
    }

    function op_between($field) {
        if ($this->operator == 'between') {
            $this->query->add_where($this->options['group'], "$field >= %d", $this->value['min']);
            $this->query->add_where($this->options['group'], "$field <= %d", $this->value['max']);
        } else {
            $this->query->add_where($this->options['group'], "$field <= %d OR $field >= %d", $this->value['min'], $this->value['max']);
        }
    }

    function op_simple($field) {
        $this->query->add_where($this->options['group'], "$field $this->operator %d", $this->value['value']);
    }

    function op_empty($field) {
        if ($this->operator == 'empty') {
            $operator = "IS NULL";
        } else {
            $operator = "IS NOT NULL";
        }

        $this->query->add_where($this->options['group'], "$field $operator");
    }

    function admin_summary() {
        if (!empty($this->options['exposed'])) {
            return t('exposed');
        }

        $options = $this->operator_options('short');
        $output = check_plain($options[$this->operator]);
        if (in_array($this->operator, $this->operator_values(2))) {
            $output .= ' ' . t('@min and @max', array('@min' => $this->value['min'], '@max' => $this->value['max']));
        } elseif (in_array($this->operator, $this->operator_values(1))) {
            $output .= ' ' . check_plain($this->value['value']);
        }
        return $output;
    }

    /**
     * Do some minor translation of the exposed input
     */
    function accept_exposed_input($input) {
        if (empty($this->options['exposed'])) {
            return TRUE;
        }

        // rewrite the input value so that it's in the correct format so that
        // the parent gets the right data.
        if (!empty($this->options['expose']['identifier'])) {
            $value = &$input[$this->options['expose']['identifier']];
            if (!is_array($value)) {
                $value = array(
                    'value' => $value,
                );
            }
        }

        $rc = parent::accept_exposed_input($input);

        if (!empty($this->options['expose']['optional'])) {
            // We have to do some of our own optional checking.
            $info = $this->operators();
            if (!empty($info[$this->operator]['values'])) {
                switch ($info[$this->operator]['values']) {
                    case 1:
                        if ($value['value'] === '') {
                            return FALSE;
                        }
                        break;
                    case 2:
                        if ($value['min'] === '' && $value['max'] === '') {
                            return FALSE;
                        }
                        break;
                }
            }
        }

        return $rc;
    }

}
